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Effectiveness of using nanoscale zero-valent iron and hydrogen peroxide in degrading sulfamethazine in water
Journal of the Taiwan Institute of Chemical Engineers ( IF 5.5 ) Pub Date : 2021-01-23 , DOI: 10.1016/j.jtice.2021.01.005
Chia-Chang Lin , Ya-Jung Cheng

This investigation elucidates the performance of using nanoscale zero-valent iron (nZVI) and hydrogen peroxide (H2O2) in the degradation of sulfamethazine in water. nZVI was mass-produced using the reductive precipitation method in a rotating packed bed with blade packings. The dependences of the degradation efficiency of sulfamethazine on pH, H2O2 concentration, nZVI dosage, and initial sulfamethazine concentration were assessed. The degradation efficiency of sulfamethazine at pH 3 substantially exceeded those at other pH 5, 7, 9, and 11. An optimal H2O2 concentration for degrading sulfamethazine (10 mg/L) at pH 3 and an nZVI dosage of 28 mg/L was 1 mmol/L. The degradation efficiency of sulfamethazine increased as the nZVI dosage was increased and the initial sulfamethazine concentration was decreased. The degradation efficiency of sulfamethazine (10 mg/L) within 5 min was 99% at pH 3 with an H2O2 concentration of 1 mmol/L and an nZVI dosage of 28 mg/L. However, the degradation efficiency of sulfamethazine (10 mg/L) using the nZVI/H2O2 process with commercial nZVI from Sigma-Aldrich was 4% at 5 min under the same conditions. Accordingly, the nZVI/H2O2 process with the mass-produced nZVI has considerable potential for the enhanced degradation of sulfamethazine in water.



中文翻译:

纳米零价铁和过氧化氢降解水中磺胺二甲嘧啶的有效性

这项研究阐明了使用纳米级零价铁(nZVI)和过氧化氢(H 2 O 2)降解水中的磺胺二甲嘧啶的性能。使用还原沉淀法在带叶片填料的旋转填充床中大量生产nZVI。评估了磺胺二甲嘧啶的降解效率对pH,H 2 O 2浓度,nZVI剂量和初始磺胺二甲嘧啶浓度的依赖性。pH 3时磺胺二甲嗪的降解效率大大超过其他pH 5、7、9和11时的降解效率。最佳H 2 O 2在pH 3和nZVI剂量为28 mg / L时,降解磺胺二甲嗪(10 mg / L)的浓度为1 mmol / L。磺胺二甲基嘧啶的降解效率随着nZVI剂量的增加和磺胺二甲基嘧啶的初始浓度的降低而增加。在pH 3下,H 2 O 2浓度为1 mmol / L,nZVI剂量为28 mg / L时,磺胺二嗪(10 mg / L)在5分钟内的降解效率为99%。但是,在相同条件下,使用Sigma-Aldrich的商用nZVI进行nZVI / H 2 O 2处理时,磺胺二嗪(10 mg / L)的降解效率为4%。因此,nZVI / H 2 O 2 大量生产的nZVI的制备方法具有增强水中磺胺二甲嘧啶降解的巨大潜力。

更新日期:2021-02-05
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